Fan



F. L. MCGAHAN, DECD.

V- K WALKER, ADMINISTRATRIX,

FAN.

APPLICATION FILED DEC-8,1919.

Patented July 18; 1922.

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ration-Bron Lt. MoGAI-IAN, or Los nnennns, CALIFORNIA; vrone. K. WALKER, ADMIN- nates isrnernrxor SAID rannnarox L McGAHAN, nacnnsnn. .assrenon-ro run runrosnn MIND DEVELOPMENT sneunrrr ASSOCIATION or THE WORLD, A racer FAN.

Specification of Letters Patent. Patented July Original application filed October 14, 1918, Serial No. 258,127. Divided and this application filed Decemher 8, 1919. Serial No. 343,354.

To all 10 7mm it 722 41 concern Be it known that I. FREDERICK L. Mo-

(iArrAN a citizen of the United States. residat the city of Los Angeles, in the county of Los Angeles and State of California. have invented certain new and useful Improvements inl ans. of which the following is a specification.

This is a division of an application filed by me October 14, 1918.; serially numbered 258,127, which has matured into Patent 1,324,427.

This invention relates to suction means in combination with a steam turbine of the radial impulse type and isillustrated as applied to the auxiliary driving of a locomotive engine. with a construction suitable for the purpose of drawing smoke, gases, sparks and other products of combustion from the fire-box. and smoke-box of an enengine. and then forcing the same, through the turbine to mingle with the steam therein.

The object of the invention is to draw the smoke and products. of combi'istion from the smolrebox. and after siipenlieat-ing or re-heatinp; steam which has been once utilized, returning these gases and products of combustion back to the firebox to be reburned. Moreover, this mechanism elimiwasteful and objectionable as. smoke. sparks. and oinders by drawing the same out of the firebox and returning the solid particles thereto for further combustion. Other economies, advantages. and improvements will hereinafter appear.

Iii-the accompanying drawings forming part of this specification and in which like numbers of reference denote like parts wherever they occur,

Fig. 1 is a vertical section through a tur bin'e equipped with the fan or suction means of'this invention.

Figure 2 is a plan view of the tan.

Figure 3' is a fragmental sectional perspective of the fan. 1

Passages 19 are conveniently connected to the. turbine .6. Steam pressureis admitted into said pi-pe,- and in applicants prior Patent 1,324,427 the steam thus ad mitted is the exhaust from the usual expansion cylinders of steam engines. This steam passes, through pipe 19 and thence into the chamber 20 surrounding the revoluble rotor ber 20.

deriving its rotary motion and driving shaft 7.

Having thusenergized the turbine 6.jthe steam passes through exhaust pipes 25 and may be used to energize or actuate another turbine (not shown).

Each rotor 21 is of substantially the same construction and mounted and connected in substantially the same manner. Upon the support 26 is fastened a ball-race- 27. which bears the bottom of the rotorf28.

Thetan 29 has a hub S'Ofixedto the shaft 7 having a plurality ofcups 91'adapted to connect-to theflangeii.

. The cups91-open in thedirectio'n toward which they rotate; tending to force the intake. The. shape within eachcup diverts theair from itsdirection when admitted to a direction approximately at an ann'le of 90 degrees thereto. 7

Fan 29 draws hot air. smoke. and cinders through pipes 80 from the top of the tirebox into the hollow chamber 50 of the rotor 21. and thereby the steam that enters cha1nber 20 through pipes 19 is rcheatcdor superheated because the hot flames and gases heat the metal of the rotor 21 thereby reheating and drying' the exhaust stem "from the cylinders. after the said steam enters the chanr A. ball race 27 cooperates with. a groove inthe bottom-28 of rotor 21 and a groove in supports 26 and 31. also. a ball race 32, (re-operates.- with a groove 33 in the flange 34 of the fan and a groove 35 in the-rotor housing 36. thereby allowing the rotor 21 to rotate freely as impelled by the action of the steamadmitted through pipes 19.: upon the helical grooves 37, and, thereby rotating shaft 7,, to whichisfixed the said rotor 21. After the steam has passed through the chamber 20 of. thehelical grooves 37,. it then. passes intothe chamber 38 of the support 26 and thence through pipe 25. I

The steam pipes 25, preferably to another turbine or motor (not shown) however. it is not necessary so far as the present case is concerned, that the exhaust steam is so utilized.

The smoke, soot, cinders, and the like are drawn into the turbine 6 through the pipe by the fan 29, and are drawn through the said fan into the chamber 50 of the rotor 21.

After the smoke has been drawn into the chamber 50 by action of fan 29 (which also draws the cinders and sparks from the firebox, fine, or smoke-pipe 80). steam is admitted into the said chamber 50 through as many valve orifices 51 aswil'l properly condense said smoke, sparks, cinder s, and soot by its being rapidly revolved and churned therein, so that, after its exit from turbine' 6, same may be discharged through a stoker back into the fire box.

Piston compression blades 72 are helical in form and may be of any desired pitch. Said blades 72are held against the highly ground surface of the rotor housing 36 at (3 by means of flat zigzag springs 74, said springs 74 being tempered tohold blades 72 in fixed position against the said surface 73.

The opening of valves 52'is accomplished through a flyball governor, having balls on the end of a bell-crank lever 54, pivotally bolted to the flange and the opening of valves 52 is brought about'by the sleeve 60,

cam wheel 62 having the hub 61, all operating as fullydescribed in my prior Patent No.1,324-A27.

The path of thesteam is indicated by arrows in Fig. 1 and,as shown, the steam passes through an open valve, 7 while the other two valves are closed illustrating that one valve may be opened while the other remains closed.

The steam, in its predetermined path, and the smoke pass through the openings 75 between the ribs 76 Ribs 7 6 are adapted to the hub 77, and the bottom of the rotor 28, and the smoke and gases pass into the chamber 7 8 of the support 26, and thence into the pipe 79, after which the mixture of smoke, steam, sparks, and soot is carried by steam pressure and fan actiolnto be reburned in the fire-box. i 7

9n the rotor housing 36, is secured by bolts 81, the cap plate 80, having acenter hub 82, in which the shaft rotates; and, at

the bottom or smaller diameter of the rotor housing 26, is a, flange 88, which is secured to the support 26 by means of bolts 8 L.

On the end of the shaft 7, there is fixed a worm S5 and a worm wheel 86, but it is evident that bevel gears, spiral gears, spur gears, and the like, could be used as well as thoseshown, with a shaft 87 fixed to the driven member 86, which shaft may be the axle of the locomotive wheels.

signature.

One object of the turbine 6 and the vacuum fan 29 is to create a draft from and through the lire-box, taking by suction any back pressure from the cylinders 5 and the piston blades '72 of turbine 6, giving the same condition that is caused by the jet condenser in the well-known stationary engine. A furtherobject is to draw all smoke, cinders, and sparks through the vacuum fan 29 and to keep a more even draft, just the necessary draft to create and regulate a perfect blaze, in the fire-box and through the fines of the locomotive. The separate driving increases the pulling power of the engine. A great advantage is acquired,=also, by the superheating of the steam in the interior of the turbine rotor 21 (chamber 50') of the locomotive turbine 6, due to the draft thereinto by the adjacent fans 29 of the hot air direct from the firebox through pipes 30 this superheated steam being further utilized.

lVhile the turbine is herein illustrated and described as utilized in connection with a situations, in which event water or steam may be used the motive power. I

Having thus described this invention, it is obvious that many minor changes in the form, arrangement and order of parts and their materials and mode of construction may be made without. departing from the spirit of this invention or the scope of the following claims.

I claim:

1. A fan of the character described, comprising a pluralityof blades radiating from the hub, said blades each forming a member having a concaved and a convexed surface terminating in straight edges radiating from the hub and in thearc of a circle, the concaved surfacesubstantially facing in the direction of the axis of the fan, saidblades being.positionedrelative to the hub to further provide an entranceinto. said concaved surface, whichentrance faces in the direction of rotation of the fan.

2; A fan'ofthe character described, com-- prising a plurality of members radiating from a hub, said members being formedwith a conca-ved and a convexed; surface terminathub and in: the are of a circle, the concave'd surface being positioned relative to the hub so as to gather air therein during its rotation and to direct the same in a direction substantially parallel to the axis of the fan.

In testimony whereof I hereuntoaflix my Panorama L. MOGAHAN.

'ing in straight edges radiating from the. 

